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5 Written questions

5 Matching questions

  1. What is the scientific meaning of the word "work"?
  2. Whats a wheel and axle?
  3. what is a machine's mechanical advantage? if i say a machine has a mechanical advantage of 20, what does that mean?
  4. example of a wheel and axle.
  5. what is a machine?
  1. a turn a door knob (the wheel) the axle moves, to unfasten the door.
  2. b it means that the machine multiplies the force you put into it twenty times. so, if the machine multiplies the force by 20, you would only have to put in a small amount of force to do a large amount of work.
  3. c a device that helps make work easier by changing the size or direction of a force.
  4. d Work happens when a force causes an object to move in the same direction of that force.
  5. e a simple machine that is made of a circular object connected to a rod.

5 Multiple choice questions

  1. P=W / T, the unit Watts
  2. a double inclined plane that moves.
  3. pushing a piece of heavy furniture up a ramp requires less input force, from you, than just lifting it up.
  4. No. you are doing work on it when you pick it up, b/c when you pick it up, the direction of the movement of the object is the same as the direction of the force you are putting on it.
  5. a machine made of two or more simple machines. example: scissors, can openers

5 True/False questions

  1. What is an inclined plane?a simple machine with a straight, slanted surface.

          

  2. What is "power", scientifically speaking?the rate at which work is done.

          

  3. ^ <--- Doing work?Yes

          

  4. What is a pulley?simple machine that is made of a wheel with a groove in it and a rope. it is usually used to life heavy objects.

          

  5. What is the fulcrum of a lever?P=W / T, the unit Watts